XML 52 R42.htm IDEA: XBRL DOCUMENT v3.22.2
Allowance for Credit Losses and Credit Quality of Loans, Summary (Details) - USD ($)
$ in Thousands
6 Months Ended 12 Months Ended
Jun. 30, 2022
Dec. 31, 2021
Mar. 31, 2022
Jun. 30, 2021
Mar. 31, 2021
Dec. 31, 2020
Allowance for Credit Losses [Abstract]            
Allowance for credit losses $ 93,600 $ 92,000 $ 90,000 $ 98,500 $ 105,000 $ 110,000
Percentage of allowance of credit losses 1.20% 1.23%        
Loans purchased with credit deterioration $ 0 $ 0        
Allowance for credit losses on loans purchased 3,200 6,800        
Accrued Interest Receivable [Member]            
Allowance for Credit Losses [Abstract]            
Allowance for credit losses 0 0        
AIR on loans 19,600 19,500        
Residential [Member]            
Allowance for Credit Losses [Abstract]            
Allowance for credit losses 16,302 18,806 17,852 19,428 20,375 21,255
Amount of loans purchased 8,000 $ 58,900        
Residential [Member] | Minimum [Member]            
Allowance for Credit Losses [Abstract]            
Premium on loans purchased   2.00%        
Residential [Member] | Maximum [Member]            
Allowance for Credit Losses [Abstract]            
Premium on loans purchased   5.00%        
Consumer Loans [Member]            
Allowance for Credit Losses [Abstract]            
Allowance for credit losses 44,940 $ 44,253 $ 43,591 $ 34,881 $ 34,580 $ 37,803
Amount of loans purchased $ 50,100 $ 92,500